A shell-like stress resultant approach for elastoplastic geometrically exact thin-walled beam finite elements

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Abstract

This paper demonstrates the computational advantages of combining shell-like stress resultant elasto-plasticity with geometrically exact thin-walled beam finite elements. The material model employed follows the Ilyushin criterion for shell-type stress resultants, making it possible to bypass computationally expensive through-thickness numeric integration and enforce specific stress resultants to zero, leading to a particularly simple form of the return mapping algorithm and of the consistent constitutive tangent. This constitutive model is included in a geometrically exact two-node beam finite element which allows for torsion-related warping and Wagner effects. The accuracy of the proposed approach is assessed in several numerical examples.

Original languageEnglish
Pages (from-to)263-272
Number of pages10
JournalThin-Walled Structures
Volume103
DOIs
Publication statusPublished - 2016

Keywords

  • Geometrically exact beam theory
  • Large displacements
  • Stress resultant elastoplasticity
  • Thin-walled members

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